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Feb. 11, 1958 c. J. BARKLEY METALLIC SKEWBACK FOR FURNACE ROOFS FiledJan. 22, 1953 Inventor- CHflPZf? 1549a 05 United Charles J. Barkley,Orem, Utah, assignor to United States Steel Corporation, a corporationof New Jersey Application January 22, 1953, Serial No. 332,645 1 Claim.(Cl. 110-99) This invention relates to a metallic skewback for sprungarch refractory roofs and especially to such skewbacks for use on openhearths and other heating furnaces. In an open hearth furnace the frontpart of the roof is ordinarily arranged so that the skewback is insubstantially a single plane. This is not true of the back part of thefurnace since the furnace has a maximum width at the main laboratorysection of the furnace and gradually decreases in width through thetransition portion to the knuckle portion of the furnace roof. The Widthremains the same from the knuckle portion to the end of the furnace butthe height of the roof increases between the knuckle portion and theroof over the ports. The usual support for the arched roof consists of awater cooled skewback beam fastened to the inside of the bnckstays whichsupports special shaped skewback bricks. A large number of differentshapes of skewback bricks are required in the transition and slopingportions of the roof. This requires stocking a great number of specialshapes which is an expensive proposition and requires a great deal ofstorage space. Since the skewback bricks have special shapes which varywith the span, rise and radius of the refractory arch, they are moreexpensive than bricks of standard shape. The use of water in closeproximity to the heated refractory is objectionable since the watersometimes comes in contact with the heated refractory bricks causingthem to spall. This makes it necessary to take the furnace out ofproduction until the damage is repaired. Since the standard skewbackbeam is close to the intense heat of the furnace it is normallynecessary to replace it after each campaign of a furnace roof. Since theroofs require the use of bricks of various shapes in the confined spacebetween the top and bottom flanges of the usual skewback beam the workof repairing the roof is slow. Since the skewback bricks are locatedabove the refractory walls of the furnace and since this is a commonplace of failure it often becomes necessary to replace the brick work atthis point before the vertical wall burns through to the danger point.

It is therefore an object of my invention to provide an air cooledmetallic skewback for refractory brick sprung arches which eliminatesthe use of special skewback bricks and protects the skewback beams fromthe heat of the furnace.

This and other objects will be more apparent after referring to thefollowing specification and attached drawings, in which:

Figure 1 is a plan view of an open hearth furnace; and

Figure 2 is an enlarged sectional view taken on the line II-Il of Figure1.

Referring more particularly to the drawings, reference numeral 2indicates a section of a heating furnace such as an open hearth furnace.The furnace 2 has two vertical refractory brick walls 4 and a sprungarch 6. As shown the arch is a ring arch, but the invention is equallyapplicable to bonded or ribbed arches. Buckstays 8 and 10 are providedon each side of the furnace and extend up- Pate G wardly along the sidewalls. The bnckstays 8, which in the open hearth furnace shown arelocated in the main laboratory portion of the furnace, have a portion 12thereof bent outwardly and upwardly from the adjacent side walls. A beam14 extends between adjacent buckstay 8 along the side wall 4 and ispositioned entirely outside of the side wall. The ends of the beams 14are attached to the bnckstays 8 by means of a bracket 16 which may be Tor angle shaped. As shown the beam 14 is an H-beam having one half ofits outer flange 17 cut away and the other flange 18 arranged atsubstantially the same angle as the inner face of the bent portion 12 ofthe bnckstays 8. The flanges 17 and 18 are connected by a Web 19. Asteel skewback plate 20 is fastened to the flange 18 preferably by meansof bolts 20b. It will be seen that the plate 20 extends upwardly andoutwardly at an angle from a point adjacent the top outside face of theadjacent refractory wall 4. A rod 21 is welded to the bottom of each ofthe plates 20 at the spring line of the arch. Refractory bricks 22 ofstandard shape may be used to make up the entire arch 6 with the bottomof the first of said bricks resting on the rod 21. Since the skewbackbeam 14 is completely outside of the furnace and since the arch 6 beginsat the outside face of the wall 4 it is possible for the walls 4 to burnalmost completely through before leakage occurs between the walls andthe arch. This is not true in the usual furnace construction. The beam14 will not be damaged by heat and it is normally necessary only toreplace the plate 20 which protects the beam 14 from damage.

While one embodiment of my invention has been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claim.

I claim:

In a furnace having spaced refractory sidewalls and a sprung refractoryarch extending between said sidewalls; the improvement comprising spacedapart bnckstays extending upwardly along one of said sidewalls, saidbuckstays having a portion thereof bent outwardly and upwardly from saidsidewall, a beam extending between and fastened to said bnckstays andpositioned entirely outside of said sidewall, a flange on said beamarranged at substantially the same angle as the inner face of the bentportion of said buskstays, a web on said beam extending normal to saidflange and outwardly therefrom, said web being located intermediate thetop and bottom of said arch, said flange and web being exposed to thesurrounding air, a protective skewback plate fastened to said flange andextending upwardly and at least to the outward extremity of said flangeand outwardly at an angle from a point adjacent the top outside face ofthe adjacent refractory wall in substantially the same plane as theinner face of the bent portion of said bnckstays.

McFeaters Aug. 8, 1950 U. S. DEPARTMENT OF COMMERCE I PATENT OFFICECERTIFICATE OF CORREC TION Patent No, 2,822,768 February 11, 1958Charles Jo Barkley It is hereby certified that error appears in theprinted specification ofthe above numbered patent requiring correctionand that the said Letters Patent should read as corrected below Column2, line 50, after "upwardly" insert and. outwardly line 51, strike out"and outwardly,

Signed and sealed this 1st day of April 1958,

(SEAL) Attest:

ARL H, AXLINE ROBERT C. WATSON Attesting Officer Conmissioner of atents

